Products
MAX31760
PRODUCTIONPrecision Fan-Speed Controller with Nonvolatile Lookup Table
Customizable Lookup Table-Based Fan Controller Enables Smooth Control of Fan Speed to Reduce Acoustic Noise
- Part Models
- 2
- 1ku List Price
- Starting From $1.66
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Overview
- Operating Settings Stored in Nonvolatile Memory for Automatic Operation at Power-On
- 48-Step Nonvolatile LUT Maps Temperature to PWM Duty Cycle
- Smooth PWM Duty-Cycle Transitions Minimize Audibility of Fan Noise
- Two Tachometer Inputs for Measuring the RPM of Two Fans Independently
- Active-Low FF/FS Pin Multiplexes Fan-Failure Output with Full-Speed Fan-Drive Input
- Accurately Senses Remote and Local Temperature
- Programmable Thermal Diode Ideality Factor Minimizes Ideality Factor Mismatch
- Automatic Series Resistance Cancellation
- Dedicated Active-Low ALERT Pin for Temperature Faults
- Active-Low SHDN Pin Available for System Overtemperature Shutdown
- 3.0V to 3.6V Operating Voltage Range
- -40°C to +125°C Operating Temperature Range
The MAX31760 integrates temperature sensing along with precision PWM fan control. It accurately measures its local die temperature and the remote temperature of a discrete diode-connected transistor, such as a 2N3906, or a thermal diode commonly found on CPUs, graphics processor units (GPUs), and other ASICs. Multiple temperature thresholds, such as local high/overtemperature (OT) and remote high/overtemperature, can be set by an I2C-compatible interface.
Fan speed is controlled based on the temperature reading as an index to a 48-byte lookup table (LUT) containing user-programmed PWM values. The flexible LUT-based architecture enables the user to program a smooth nonlinear fan speed vs. temperature transfer function to minimize acoustic fan noise. Two tachometer inputs allow measuring the speeds of two fans independently. The active-low FF/FS pin multiplexes an open-drain fan-failure output with a full-speed fan-drive input. When the local or remote OT threshold is exceeded, the active-low SHDN pin is asserted low and can be used to shut down the system. A dedicated active-low ALERT pin reports that either a local or remote high-temperature threshold has been exceeded. Active-low ALERT can be programmed to work in either fault indicator mode or interrupt mode. These features make the device a compact and complete solution for a single-fan or two-fan cooling system.
Applications
- NAS/DAS
- Networking Equipment
- Servers
- STB/DVR
Documentation
Data Sheet 1
3rd Party Solutions 1
Device Drivers 1
Analog Dialogue 2
Webcast 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX31760AEE+ | QSOP | ||
| MAX31760AEE+T | QSOP |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Apr 20, 2026 - 2571B PIN/ERRATA |
||
| MAX31760AEE+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
Evaluation Software 0
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Tools & Simulations
Software Development 2
IBIS Model 1
Evaluation Kits
Evaluation Kit for the MAX31760